Radiator for motor vehicles



RADIATOR FOR MOTOR VEHIOLES O Filed July 8. 1929 2 Sheets-Sheet l Fig.1

Feb. 24, 1931. v. VALLETTA RADIATOR FOR MOTOR VEHICLES Filed ul 8, 1929 2 Sheets-Sheet 2 Patented Feb. 24, 1931 UNITED STATES PATENT owner. I"

VITTOBIO 'lTALLE'ITA, OF TUBIN, ITALY, ASSIGNOR TO FIAT SOCTETA ANONIHA, 01'

TURIN, ITALY RADIATOR FOB MOTOR VEHICLES Application flled luly 8, 1929, Serial No. 376,759, and in Italy June 7, 1929.

This invention relates to the kind of 'radiators formedbya plurality of corrugated strips of thin metal sheet assembled together in such a way as a form zig-zag conduits for the flow of water andconduits for the flow of air in a direction which is perpendicular to the direction in which the water flows.

The improvement forming the object of this invention has the purpose to produce a whirl- 1oing motion in the current of air passing in said conduits promoting the heat exchange between the air and the wall along which it flows. The wall of each strip is provided for this purpose with .one or more projections 16 preferably arranged in staggered relation to the projections on the adjacent wall extending slightly beyond the edge formed by said two adjacent walls and situated externally of the water flow.

I 80 The annexed drawing shows by way of ex ample a constructional form of the invention.

Fig. 1 shows in front view a radiator section of the mentioned kind ;Fig. 2 is an enlarged detail vertical sect-ion of theradiator.

Figs. 3 and 4 are perspective views of-two strips slightly different from each other.

Referring to the drawing, 1 and 1 denote two metal sheet strips having equal zig-zag corrugations and forming once assembled a water conduit. Each wall 2, 3 of said strips more particularly the outer portion. into contact with the airand thereof comin carries projections 4 and 5 preferably arranged in staggered relation in the two adjacent elements and extending slightly beyond the edge 6 formed by two ad acent walls. Each of said Walls is provided with one or a plurality of-such projections, which can be more or less prominent and are obtained for to each other after they have been broughtv together, thus making assembling easier and improving the conditions in which it may be effected. I

What I claim is: 1. Radiator for motor vehicles comprising elements formed by sheet metal strips bent in zig-zag shape and connected two by two at .their vertical longitudinal edges to "form water conduits, the pairsof strips thus connected being placed side by side in order to form the air conduits and transverse projections formed on the walls of said air conduits in order to generate whirling motions of the air flowing along said conduits, said projections extending beyond the adjacent edge of the oppositely situated strips so as to work as holding members for retaining the strips in position during their? assemblage.

2. Radiator for motor vehicles comprising elements formed by sheet metal strips bent in zig-zag shape and connected two by two at their vertical longitudinal ed es to form water conduits, the pairs of strips thus connected being placed side byside in order to form the air conduits, transverse projectlons formed on one wall of said conduits andpther projections arranged in staggered relation to the former on the adjacent walls, said projections being adapted to generate whirling motions of the air flowing along sald condults and extending beyond the: adjacent edge of the oppositely situatedstrip in order to work as holding members for holdin said strlps in position during their assemb age.

In testimony that I claim the foregoing as my invention, I have signed in name.

VITTORIO v LLETTA. 

